{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,23]],"date-time":"2026-02-23T13:24:30Z","timestamp":1771853070235,"version":"3.50.1"},"reference-count":20,"publisher":"World Scientific Pub Co Pte Lt","issue":"02","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Int. J. Patt. Recogn. Artif. Intell."],"published-print":{"date-parts":[[2015,3]]},"abstract":"<jats:p> We present a novel method for detecting rotated lungs in chest radiographs for quality control and augmenting automated abnormality detection. The method computes a principal rib-orientation measure using a generalized line histogram technique for quality control, and therefore augmenting automated abnormality detection. To compute the line histogram, we use line seed filters as kernels to convolve with edge images, and extract a set of lines from the posterior rib-cage. After convolving kernels in all possible orientations in the range [0\u00b0, 180\u00b0), we measure the angle with maximum magnitude in the line histogram. This measure provides an approximation of the principal chest rib-orientation for each lung. A chest radiograph is upright if the difference between the orientation angles of both lungs with respect to the horizontal axis is negligible. We validate our method on sets of normal and abnormal images and argue that rib orientation can be used for rotation detection in chest radiographs as an aid in quality control during image acquisition. It can also be used for training and testing data sets for computer aided diagnosis research, for example. In our experiments, we achieve a maximum accuracy of approximately 90%. <\/jats:p>","DOI":"10.1142\/s0218001415570013","type":"journal-article","created":{"date-parts":[[2014,10,24]],"date-time":"2014-10-24T09:27:16Z","timestamp":1414142836000},"page":"1557001","source":"Crossref","is-referenced-by-count":24,"title":["Automatically Detecting Rotation in Chest Radiographs Using Principal Rib-Orientation Measure for Quality Control"],"prefix":"10.1142","volume":"29","author":[{"given":"K. C.","family":"Santosh","sequence":"first","affiliation":[{"name":"National Library of Medicine, National Institutes of Health, 8600 Rockville Pike, Bethesda, MD 20894, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sema","family":"Candemir","sequence":"additional","affiliation":[{"name":"National Library of Medicine, National Institutes of Health, 8600 Rockville Pike, Bethesda, MD 20894, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Stefan","family":"Jaeger","sequence":"additional","affiliation":[{"name":"National Library of Medicine, National Institutes of Health, 8600 Rockville Pike, Bethesda, MD 20894, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Alexandros","family":"Karargyris","sequence":"additional","affiliation":[{"name":"National Library of Medicine, National Institutes of Health, 8600 Rockville Pike, Bethesda, MD 20894, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sameer","family":"Antani","sequence":"additional","affiliation":[{"name":"National Library of Medicine, National Institutes of Health, 8600 Rockville Pike, Bethesda, MD 20894, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"George R.","family":"Thoma","sequence":"additional","affiliation":[{"name":"National Library of Medicine, National Institutes of Health, 8600 Rockville Pike, Bethesda, MD 20894, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Les","family":"Folio","sequence":"additional","affiliation":[{"name":"Department of Radiology and Imaging Sciences, Clinical Center, National Institutes of Health, 8600 Rockville Pike, Bethesda, MD 20892, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"219","published-online":{"date-parts":[[2015,2,27]]},"reference":[{"key":"rf1","volume-title":"Current Diagnosis and Treatment Critical Care","author":"Bongard F.","year":"2008"},{"key":"rf2","doi-asserted-by":"publisher","DOI":"10.1109\/34.969114"},{"key":"rf3","doi-asserted-by":"publisher","DOI":"10.1109\/TMI.2013.2290491"},{"key":"rf4","volume-title":"Chest X-Ray Made Easy","author":"Corne J.","year":"2010"},{"key":"rf5","doi-asserted-by":"publisher","DOI":"10.1016\/0734-189X(83)90109-3"},{"key":"rf6","doi-asserted-by":"publisher","DOI":"10.1007\/978-1-4419-5854-9"},{"key":"rf7","doi-asserted-by":"publisher","DOI":"10.1007\/978-1-4614-1317-2"},{"key":"rf8","first-page":"12","volume":"3","author":"Folio L.","year":"2014","journal-title":"J. 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